Skate sharpening jig



P 2, G. R. PLANERT ET AL 1,926,404

SKATE SHARPENING JIG Filed Sept. 22, 1950 2 Sheets-Sheet 1 W220i Wm M@ of Patented Sept. 12, 1933 PATENT OFFICE SKATE SHARPENING JIG George R. Planert and Wallace F. Mitchell, Chi cage, 11]., assignors to F. W. Planert & Sons, Inc., Chicago, Ill., a corporation of lllinois Application September 22, 1930 Serial No. 483,729

Claims. (Cl. 51 -228) Theinvention relates to a skate sharpening jig, and more particularly to a construction of jig whereby the various parts thereof are held and locked in a firm and substantially rigid position so that a pair of skates may be properly, quickly andsimultaneouslysharpened while in the jig. Heretofore in skate sharpening jigs of the character shown and described wherein the endframes or standards are connected by a base, and more particularly where they are connected by a rod, bar or other connecting means, there is a certain amount of play or movement between the parts of the structure. This play or movement between the Various parts of the structure increases. with use of the skate sharpening jig, and causes the end frames or standards to move so much with relation to the connecting rod that it seriously interferes with the sharpening of the skates, causing the blades thereof to move and ibeout of proper alignment for sharpening.

The principal object of the invention is to remove the play or movement of the various parts of the structure mentioned by constructing the end frames or standards with certain means, and connecting them with means whereby the end standards may be held substantially rigid and firmly while the skate sharpening operation is in progress.

It is a further object of the invention to pro- .vide frame connecting means'which are so flexible that in case any play or movement of the parts should develop because of wear or use thereof, the flexible means will permit additional or further tightening, or substantially rigid adjust- Another object of the invention is to so construct the frames or standards of the jigthat they areinterchangeable and may be used at either end portion of the connecting rod.

A further object'of the invention is to construct the flexible tightening and connecting means in such a manner that it maybe used interchangeably with the frames or standards of the jig.

The invention will be further understoodby reference to the accompanying drawings i1lustrating one embodiment thereof, although it will be apparent that changes therefrom'may be made without departing from the spirit of therinvention as set forth in the appended claims.

In the drawings: Figure l is a top plan view of the skate sharpening jig showing a pair of tubular ice skates, which are fastened to a pair of shoes, secured and held in the jawsof the standards or frames, in operain detail.

tive position and also showing tlieflexible standard tightening means,

Figure 2 is a side elevation of the structure shown in Figure 1,

Figure 3 is across sectional view of the skate sharpening jig on the line 3-3 of Figure 1, showing the-flexible tightening means and the skate and shoe in elevation, and

Figure 4 is a cross sectional view on the line 4-4 of Figure 2.

The skate sharpening jig of the invention comprises a pair of separate standards or frames generally designated 10 and 11, which are connected together by a connecting rod 12, on which the two standards-may slide to and be spaced vat their desired positions depending on the size of the skates to be sharpened. The standards are adapted to rest on a counter, bench, table or other suitable, support when in use.

The flexible tightening or locking means or chain extending from one standard or frame to the other is generally designated 13. A pair of ice skates 14 and 15, which are of the tubular variety and-which are permanently secured to shoes, are shown 'in position for grinding or sharpening between the standards or frames of the jig. It will be understood that any type of ice-skates may be held in the jig and sharpened.

The standards or frames 10 and 11 are identical in theirconstruction andmay therefore be used interchangeably on the connecting rod 12, which extends through each standard. Since they are identical in their construction and mode of-operatiomonly one standard will be described It will be understood, however, that although the construction of the standards or frames is identical they are preferably: used in the positions shownin the drawings, that is, with their base portions or feet extending outwardly, and their headportions having jaws extending 95 inwardly. It is possible, however, to use the standards or frames with the base and head portions extending in either direction.

Each of the standards or frames is provided with the lower or base portion 16 having the out- 100 wardly extending foot portions 17. Uprights 18 and 19 extend from the base 16 and are connected by the transverse portions 20 and 2 1. The transverse portion 21 is at the top and the transverse portion 20 is intermediate the base Y16 and the 105.

"The base 16 ofthe standard or frame together with the upright portions 18 and 19 andthe transverse portions 20 and 21, are integral, and, with the pivoted separate arms 22 and 23, form the standard or frame of the jig.

The base portion 16 of the jig is provided with the boss 26 which in turn is bored to provide the aperture or hole 27 to receive the end portion of the connecting rod 12. Extendingabovethe boss 26 and integral therewith is the tab or ear 28 provided with the aperture 29. This tab or ear with its aperture is constructed to receive the lower end of the flexible tightening means or spring chain when it is in operative position.

The intermediate integral transverse cross bar 20 is provided with the upwardly extending prongs 30 and 31. These upwardly extending prongs 30 and 31 with the intervening space between them are used for the reception of the opposite or upper end portion of the flexible means or spring chain which connects the two standards andmaintains them in firm and substantially rigid position while the skates are being held and secured in the jig and their blades are being ground or'sharpened. It will be understood that only one of the prongs 30 and 31 may be used depending on the construction of the flexible means or spring chain. It will also be understood that a single prong or projection may be provided on the cross bar 20 instead of the pair of prongs,.provided that the chain or other means can be fastened thereto as required.

The top integral transverse cross bar 21 is formed at each of its ends with forked or bifurcated portions the ends of which serve as jaws for the skate blades and supports for the skates, respectively. The jaws 32 and 33 each extend outwardly from the top portion of the top cross bar 21, and the skate'supporting arms 34 and 35 extend outwardly from the bottom portion of the cross bar 21 and from theuprights 18 and 19,

respectively.

Itwill be noted that the skate supporting arms 34 and 35 extend beyond the uprights 18 and 19 but do not quite reach the separate pivoted arms 22 and 23 when they have been moved to their operative-position against the skate blade, as

best shown in Figure'4.

The pivoted arms 22 and 23 are provided with the inwardly extending jaws 36 and3'7 respective- .ly. The jaws 32, 33 and 36, 37 are flared and incretsed in size to furnish clamping surfaces which are adequate to firmly hold the skate blades between them.

The outer faces of the jaws 32 and 33 and the inner faces of the'jaws 36 and 37, which face each other in pairs, are preferably ground or finished to furnish true and accurate vertical faces between which the blades 38 and 39 of the skates 14 and 15, respectively, may be received.

The skates 14 and 15 rest upon .the supporting ledges 34am 35 while their blades as and 39.

respectively, are clamped in vertical position'between the faces of the jaws 32, 36 and 33, 37, respectively.

The pivoted arms 22 and 23 are held in position so that their jaws 36 and 37 respectively,- may be forced against the skate blades 38 and 39 by means of the bolts 40 and 41, provided with coil springs 40a and 41a and wing nuts'42 and'43. The bolts 40 and 41 are passed through oppo-" are square so as to receive] the square shanks of the jaws 32, 36 and 33, 37, respectively.

the bolts 40 and 41, so as to hold the bolts against rotation, and as best shown in Figure 4 of the drawings.

The apertures in the enlargements 46 and 47 are of suitable size to receive the bolts and permit movement of the pivoted arms 22 and 23. The head and square shanks of the bolts 40 and 41 are at the inner ends of the apertures in the enlargements 44 and while the wing nuts 42 and 43 are on the outwardly extending threaded ends of the bolts 40 and 41.

By the means just described and as best shown in Figure 4, it will be seen that the jaws 36 and 37 of the pivoted arms 22 and 23 may be brought firmly into position against the blades 38 and 39 to hold and clamp them in position for sharpening.

It will be understood, of course, that the blades 38 and '39 of the skates must be placed in practically perfect alignment so that they may be properly ground or sharpened for use. A sharpening stonesu'ch as may be used'with the skate sharpening jig of the invention is illustrated at 48 in Figure 4 of the drawings.

The means used to hold and lock the two standar'ds or frames to the rod, and which is generally designated 13, as shown in the drawings, preferably comprises a spring 49 and a chain 50. The coiled spring 49 is provided at one end with a hook portion 51 adapted to be hooked in the aperture 29 in the ear 28 extending from the boss 26. The opposite end of the coiled spring 49 is also provided with a hook portion 52. The

. hook portion 52 is hooked into a link at one end of the chain 50. A ring 53 is secured in the opposite end of the chain furnishing a means for tightening or loosening the spring chain.

It will be understood that the invention covers any form of frame connecting and holding means and particularly any form of spring and chain means whether the spring is at either end of the connectoror intermediate the ends thereof.

In operating the skate sharpening jig, the skates, which usually have shoes permanently attached. to them, are placed in position on the extended arms or ledges 34 and 35. In order to do this the pivotedarms 22 and 23 are swung outwardly or from the uprights 18 and 19 on the pivots 24. and 25, respectively, and the bolts 40 and 41 with their springs 40a and 41a by the turn ing of the wing nuts 42 and 43.

After theskates have been placed 1n position on the ledges 34 and 35, the blades 38 and 39 of the skates are brought into alignment between The blades are not only lined up evenly transversely above the jaws, but they are also lined up evenly longitudinally, so that both blades extend equal distances beyond the jaws.

The jaws are then closed and tightened against the skate blades by screwing the wing nuts 42 and 43 on the bolts 40 and 41, against the tension of the springs 40a and 41a. After-the blades of the skates are securely held in position between the jaws of thejig they may be ground or sharpened by means of the stone 48, or other suitable sharpening means.

In connectionwith the operation of sharpening the blades, there is usually movement of the frames or standards 10 and 11,on the rod 12 in the apertures 2'7. As this movement increases, the aperture 27 is made'larger by constant wearing away of the metal. 'Thereupon the surfaces; of the blades of the skates to be sharpened get out of proper alignment and it is impossible to correctly sharpen the blades until readjustment thereof be made. This movement of the frames or standards '10 and 11 is entirely obviated by means of the invention. 'The hook portion 51' is placed in the aperture 29 of the ear 28 extending from the boss 26, and the opposite end portion of the chain 50 with the ring 53 is grasped and pulled against the tension of the spring 49, and when the chain and the spring have been sufficiently pulled, one of the links of the chain 50 is placed in the space between the prongs 30 and 31 of the intermediate bar 20. I

Due to the canting of the frame 10 against the rod 12, because of the pull of the spring 49 and the chain 50, and the securing and locking of the opposite end portion of the chain in the p on s and 31, together with the holding of the frame 11 against the opposite end portion of the rod 12, and also the fastening of the jig 20 against the blades, the whole structure is substantially rigid and free from any play or movement to interfere with the proper alignment and sharpening of the blades.

As stated, it will be understood that the chain 2 and spring may be used with the hook of the spring in either standard, and the chain portion in the other standard, since both standards are provided with the apertures for the hook and the prongs for the chain.

It will be seen that by the use of the chain and coil spring, the frames or standards may be placed in any desired position on the rod to fit any size of shoes and skates, or any kind of skates, and that the coil spring and the links of the chain permit a flexibility of operation which will enable the user to hold or lock the two standards or frames on the rod, no matter what size of shoes and skates are in the jig, nor

how far apart the standards are from each other on the rod.

It will also be seen that the combined chain and spring is very quickly placed in operative position and as quickly detached.

V A further important consideration is that the jig with the chain and spring may be readily packed for transportation and quickly assembled for sale and use.

Having thus described the invention what we claim and desire to secure by Letters Patent is:

1. In a skate sharpening jig, the combination of a pair of skate clamping frames, supporting means for said frames extending between them and movable relatively to said frames for adjustment purposes as to different lengths of skates, and a stress exerting holding means connecting said frames arranged transversely of each of said frames and longitudinally'in the jig and canting the same relatively to said supporting means and eliminating looseness of connection between said frames and said supporting means with a skate clamped by said frames.

2. In a skate sharpening jig, the combination of a pair of skate clamping frames, supporting p means for said frames extending between them 'and movable relatively to said frames for adjustment purposes as to different lengthsv of skates, and a spring and chain connecting said frames and canting the same relatively to said supporting means and eliminating looseness of connection between said frames and said supporting means with a skate clamped by said frames.

3. In a skate sharpening jig, the combination ..of a pair of skate clamping frames, a supporting rod extending through said frames and having sliding engagement therewith for adjustment purposes as to different lengths of skates, and a stress exerting holdingmeans connecting said frames arranged transversely of each .of said frames and longitudinally in the jig and cant' ing the same relatively to said supporting -means and eliminating looseness of connection between said frames and said supporting means with a skate clamped by said frames.

4. In a skate sharpening jig, the combination of a pair of skate clamping frames, a supportingl'od extending through said frames and having sliding engagement therewith for adjustment purposes as to different lengths" of skates, and a spring and chain connecting said frames and canting the same relatively to said supporting means and eliminating looseness of connection between said frames and said supporting means with a skate clamped by said frames.

5. In a skate sharpening jig, the combination of a pair of skate clamping frames, supporting means for said frames extending between them and movable relatively to said frames for adjust ment purposes as to different lengths of skates, and a spring and chain connecting said frames and canting the same relatively to said supporting means and eliminating looseness of connection between said frames and said supporting means with a skate clamped by said frames, one

of said frames having a lug removably engaging a desired link of said chain.

, 6. In a skate sharpening jig, the combination of a pair of skate clamping frames, a supporting rod extending through said frames and having sliding engagement therewith for adjustment purposes as to different lengths of skates, and a spring and chain connecting said frames and canting the same relatively to said supporting means eliminating looseness of connection between said frames and said supporting means with a skate clamped by said frames, one of said frames having a lug removably engaging a desired link of said chain. 1

7. In a skate sharpening jig, the combination of a pair of skate clamping'frames, supporting means for said frames extending between them and movable relatively to said frames for adjustment purposes as to different lengths of skates,

8. In a skate sharpening jig, the combination of a pair of skate clamping frames, a supporting rod extending through said frames and having sliding engagement therewith for adjustment purposes as to different lengths of skates, and aspring and chain connecting said frames and canting the same relatively to said supporting means and eliminating looseness of connection between said frames and said supporting means with a skate clamped by said frames, one of said frames having a pair of spaced lugs removably receiving and holding between them a desired link of said chain.

9. In a skate sharpening jig, the combination of a pair of skate clamping frames, supporting means for said frames extending between them and movable relatively to said frames for adjustment purposes as to different lengths of skates, a spring having hooks on its ends, and a chain connected with one of said spring hooks connecting said frames and canting the same relatively to said supporting means and eliminating looseness of connection between said frames and said supporting means with a skate clamped by said frames, each of said frames having a spring hook engaging portion and a lug for removably engaging a desired link of said chain, whereby said spring may be connected with one of said frames and said chain may be connected with the other of said frames as desired. a

10. In a skate sharpening jig, the combination of a pair of skate clamping frames, supporting means for said frames extending between them and movable relatively to said frames for adjustment purposes as to different lengths of skates,

a spring having hooks on its ends, and a chain connected with one of said spring hooks connecting said frames and canting the same relatively to said supporting means and eliminating looseness of connectionbetween said frames and said supporting means with a skate clamped by said frames, each of said frames having a spring hook engaging portion and a pair of spaced lugs for removably receiving and holding between them a desired link of said chain, whereby said sprlng may be connected with one of said frames and said chain may be connected with the other of said frames as desired;

GEORGE R. PLANERT. WALLACE F. MITCHELL. 

